JPH1089334A - Eccentric anchor bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate arrangement of a fixation bolt at a specified position even in the case that it is impossible to arrange fiation anchor insertion holes in line or with constant spacings by eccentrically forming a fixation bolt screwing part in respect to an axis of a fixation anchor screwing part. SOLUTION: A fixation anchor 2 having a female screw 2a is applied to a fixation anchor insertion hole 6 and fixed thereto. Afterward, a receiving bolt 1 is screwed with the female screw 2a of an anchor 2 by the use of a male screw 1b. The anchor insertion hole 6 is dislocated from a presvribed axial center by 2 to 6 mm. The receiving bolt 1 screwed with the anchor 2 is dislocated at its bolt screwing part 1c by 2 to 6 mm. Dislocation is adjusted to make the axes of the bolt screwing parts 1c agree with each other. A fixation bolt 3 is inserted through a bolt through-hole 4a of a member 4. A male screw 3a of a bolt 3 is screwed with a female screw ld of the bolt screwing part 1c of the receiving bolt l, and fixed thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an anchor bolt used when attaching a member to a base material such as a concrete structure.

[0002]

2. Description of the Related Art As a method of attaching a member such as a steel plate to a base material such as a concrete structure, first, a fixing anchor insertion hole having a predetermined diameter and a predetermined depth is formed in the base material, and a fixing bolt external thread is inserted into the hole. There is a method in which a fixing anchor having a female screw to be screwed is inserted, a bolt insertion hole of the member is aligned with a screw hole of the fixing anchor, and a fixing bolt is screwed into the screw hole through the bolt insertion hole of the member.

[0003]

Attachment of a member to a structure by this method is very common,
It has the following problems.

When attaching a member of a certain size to a base material such as a reinforced concrete structure, a plurality of anchor bolts are used. At this time, if a reinforcing bar is placed at a place where the anchor anchor insertion hole is to be drilled, or if it has a shape or a place where drilling is difficult, it must be drilled while avoiding this. For this reason, the positions of the plurality of anchor bolts cannot be taken on a straight line, and a certain interval cannot be taken.

In this case, the position of the fixing bolt is naturally not linear or at a constant interval. Therefore, the appearance of the fixing bolt is deteriorated, and sometimes the function of the anchor bolt cannot be sufficiently exhibited for the purpose. Having.

Therefore, the present invention has been made so that the fixing bolts can be positioned linearly or at a constant interval even when the fixing anchor insertion holes cannot be positioned linearly or at a constant interval in the base material.

[0007]

Means for Solving the Problems The above-mentioned problems are solved as described below.

That is, in order to solve the above-mentioned problems, in an anchor bolt including a fixing anchor and a fixing bolt, one of a fixing anchor threaded portion having a male screw to be screwed to a female screw of the fixing anchor and the other of the fixing bolt is provided. Provided is an eccentric anchor bolt having a fixing bolt screw portion having an internal thread for screwing a screw, and using a receiving bolt formed by eccentricizing the fixing bolt screw portion with respect to the axis of the fixing anchor screw portion. .

[0009]

Embodiments of the present invention will be described with reference to the drawings.

First, an embodiment of a receiving bolt used in combination with an anchor bolt including a fixing anchor and a fixing bolt will be described with reference to FIGS. 1 (a) to 1 (c).

Each of the receiving bolts 1 has a fixing anchor screwing portion 1a having a male screw 1b screwed into a female screw of the fixing anchor and a fixing bolt screwing portion 1c having a female screw 1d for screwing a male screw of the fixing bolt. Has become.

In FIG. 1 (a), the receiving bolt 1 is formed such that the fixing anchor screw portion 1a and the fixing bolt screw portion 1c are aligned in the same axial direction. The bolt 1 is formed such that the axis of the fixing bolt screwing portion 1c is eccentric with respect to the axis of the fixing anchor screwing portion 1a by 2 millimeters. In FIG. The axis of the portion 1c is formed to be eccentric by 6 mm with respect to the axis of the fixing anchor screwing portion 1a.

FIGS. 2A to 2C and FIGS. 3A to 3C show an embodiment of a construction procedure for attaching a member to a concrete structure by using an anchor bolt together with the receiving bolt 1. ).

First, as shown in FIG. 2, a plurality of fixing anchor insertion holes 6 are formed on a straight line on the member mounting surface of the structure.
(B) As shown in (c), the boring 7 is secured so as to cope with the eccentricity of the screwing portion 1c of the fixing bolt of the receiving bolt 1 described above. At this time, the fixing anchor insertion hole 6 shown in (b) is pierced with the axial center shifted by 2 mm with respect to the fixing anchor insertion hole 6 shown in (a).
The fixing anchor insertion hole 6 shown in (c) is bored with the axis shifted by 6 mm.

Next, as shown in FIG. 3, the fixing anchor 2 having the internal thread 2a is driven into the fixing anchor insertion hole 6, and is fixed together with an adhesive if necessary. Then, the receiving bolt 1 is screwed into the female screw 2a of the anchor 2 using the male screw 1b.

At this time, the fixing anchor insertion hole 6 shown in FIG.
Are drilled with a displacement of 2 mm, and the fixing anchor insertion holes 6 shown in (c) are drilled with a displacement of 6 mm, so that the receiving bolts 1 to be screwed to the respective fixing anchors 2 have fixing anchor screwing portions 1 a. The receiving bolt 1 is formed such that the axis of the fixing bolt screwing portion 1c is eccentric to 2 mm with respect to the axis of the fixing bolt screwing portion 1c. Using a receiving bolt 1 whose center is formed eccentrically by 6 mm,
The shift position is adjusted so that the axes of the fixing bolt threaded portions 1e coincide with each other as shown in (a), (b) and (c).

Next, the fixing bolt 3 is inserted through the member 4 through a bolt insertion hole 4 a formed in the member 4.
The male screw 3a and the female screw 1d of the fixing bolt screwing portion 1c of the receiving bolt 1 are screwed together to fix and fix.

In this manner, the fixing bolt screwing portion 1a is fixed to the axial center of the fixing anchor screwing portion 1a to a degree corresponding to the displacement of the plurality of fixing anchor insertion holes 6 on the straight line and the gap. By selecting and using the receiving bolt 1 in which the axis of the portion is eccentric, the fixing bolt position can be corrected.

In the embodiment of the present invention, the receiving bolt is shown in the case where the eccentricity of the fixing bolt screwing portion with respect to the axis of the screwing portion of the fixing anchor is 2 mm and 6 mm, but other eccentric distances are shown. By preparing different receiving bolts, it is possible to select a bolt that matches the amount of eccentricity of the application location.

Since the present invention is configured as described above, it can be widely used for mounting members at various places. In particular, it is effective in fixing a reinforcing material to an end or a corner of a structure.

For example, in order to fix the reinforcing member at the corner of the haunch of the reinforced concrete floor slab, it is important to position the fixing bolt at a predetermined position on a straight line along the corner of the haunch. The shape of the predetermined position is a shape that is difficult to drill the anchor anchor insertion hole,
There is a case where the reinforcing bar is arranged at a predetermined position and the fixing anchor insertion hole cannot be formed. In such a case, the fixing anchor insertion hole is pierced by shifting the piercing position, the fixing anchor is driven into the hole, the receiving bolt is screwed to the fixing anchor, and the fixing bolt screwing portion of the receiving bolt is positioned at a predetermined position. After that, the reinforcing member can be fastened and fixed by using the fixing bolt, so that the fixing bolt can be located at a predetermined position.

[0022]

The present invention has the following effects because it is constructed as described above.

There is a fixing anchor screw portion having a male screw that is screwed into the female screw of the fixing anchor, and a fixing bolt having a female screw that is screwed with the male screw of the fixing bolt. By interposing a receiving bolt formed eccentrically with respect to the axis of the part, even if the anchor anchor insertion hole is displaced from the predetermined position where it should be originally drilled, Fixing bolts can be used.

Therefore, even when a plurality of fixing anchor insertion holes cannot be drilled in a predetermined position such as a straight line or a fixed space in the base material, the fixing bolt can be secured at a predetermined position, so that the appearance is good and the appearance is good. The fastening function at the required mounting position of the member can be sufficiently exhibited.

Further, since the fixing bolt is fixed at a predetermined position, it is possible to pre-drill the mounting member.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a plurality of embodiments of a receiving bolt. FIG. 1A shows a receiving bolt without eccentricity,
(B) shows a receiving bolt in which the axis of the fixing bolt screw portion is eccentric by 2 mm with respect to the axis of the fixing anchor screw portion. 5 shows a receiving bolt eccentric with respect to the axis of the joint by 6 mm.

FIG. 2 is an explanatory view showing a state in which a plurality of fixing anchor insertion holes are drilled on a member mounting surface of a structure, wherein (a) shows a fixing anchor insertion hole drilled at a predetermined position, and (b) shows an axial center. Indicates a fixing anchor insertion hole drilled with a shift of 2 mm, and (c) indicates a fixing anchor insertion hole drilled with a shaft center shifted of 6 mm.

3 (a), (b), and (c) shown in FIG. 2 are respectively screwed with receiving bolts (a), (b), and (c) shown in FIG. 1, and members are attached by fixing bolts. It is sectional drawing which shows a state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Receiving bolt 1a Fixing anchor screwing part 1b Male screw 1c Fixing bolt screwing part 1d Female screw 2 Fixing anchor 2a Female screw 3 Fixing bolt 3a Male screw 4 Member 5 Structure 6 Fixing anchor insertion hole 7

Claims (1)

[Claims] A fixing bolt screwing portion having a male screw threadedly engaged with a female screw of the fixing anchor; and a fixing bolt threaded portion having a female screw threadedly engaged with a male screw of the fixing bolt. An eccentric anchor bolt characterized by using a receiving bolt formed by eccentricizing a fixing bolt screw portion with respect to an axis of the fixing anchor screw portion.